CN103926524A - Method for testing converter valve control device in low-voltage control mode - Google Patents
Method for testing converter valve control device in low-voltage control mode Download PDFInfo
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- CN103926524A CN103926524A CN201410159985.2A CN201410159985A CN103926524A CN 103926524 A CN103926524 A CN 103926524A CN 201410159985 A CN201410159985 A CN 201410159985A CN 103926524 A CN103926524 A CN 103926524A
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Abstract
The invention relates to a method for testing a converter valve control device in a low-voltage control mode, and belongs to the technical field of extra-high voltage direct current transmission. CP signals are generated by the converter valve control device by sampling alternating voltages applied to thyristors, the converter valve control device triggers the thyristors according to return signals of the thyristors and the generated CP signals, whether the corresponding thyristors are connected or not is judged, and then the converter valve control device is tested in the low-voltage control mode. The method for testing the converter valve control device can be achieved through self configuration of the converter valve control device, and a converter valve can simulate a normal operating state in the low-voltage environment to meet testing and debugging requirements. When the converter valve control device is tested in the low-voltage control mode, the power of light trigger pulses sent to the converter valve thyristors by the converter valve control device is smaller than the power of light trigger pulses sent by the converter valve control device in the normal operating state, and therefore potential safety hazards of system elements can be found in advance.
Description
Technical field
The method of testing that the present invention relates to a kind of converter valve opertaing device low-voltage control model, belongs to extra-high voltage direct-current transmission technical field.
Background technology
In extra-high voltage direct-current transmission, converter valve opertaing device is the core control equipment of converter valve operation.Its major function is the control command that receiving pole control issues, control command is resolved, encoded, and the light pulse signal after recompile is sent to converter valve thyristor control panel, and the operation of converter valve is controlled, also converter valve running status is monitored simultaneously.
Because extra-high voltage direct-current engineering electric pressure is higher, the current 800kV that is generally.Any fluctuation of system all likely brings very large harm to regional power grid.Converter valve and valve control are as the nucleus equipment of current conversion station, and can it stablize, reliable operation is directly connected to the safety that is attached thereto electrical network.Therefore, straight-flow system, before the high-voltage operation that powers on, is carried out simulated experiment under low-voltage-grade, and the regular routine inspection of valve and valve control is just become to very necessary.Domestic and international valve control equipment of the same type is when doing low-voltage experiment at present, cannot directly control and trigger and monitor thyristor, can only test one by one by building new detection loop, trouble very, and owing to will dismantling optical fiber, operating process may cause damage to equipment, makes equipment inspection have certain risk.Equipment component arranges utmost point control simulation by pressure and issues control command and to valve control system, complete to detect and test, and need external ancillary equipment setting, operation more complicated, and can not effectively check out the potential safety hazard existing in part system element, after off-test, complicated too to the recovery of system.Requirement to operating personnel is higher, and the careless slightly straight-flow system that may cause starts unsuccessfully, and network system is caused to certain infringement.
Summary of the invention
The method of testing that the object of this invention is to provide a kind of converter valve opertaing device low-voltage control model, to solve existing converter valve opertaing device, cannot directly control when the low voltage test and trigger and monitor that thyristor causes test process complicated, tests inaccurate problem.
The present invention is for solving the problems of the technologies described above the method for testing that a kind of converter valve opertaing device low-voltage control model is provided, and this method of testing comprises the following steps:
1) under low voltage control pattern to converter valve in thyristor apply alternating voltage, make thyristor send it back to converter valve opertaing device the number of notifying;
2) according to receiving the AC power that applies of return signal, sample;
3) make converter valve opertaing device produce CP signal according to the phase place of sampled signal, the CP signal that it produces is effective when the alternating current positive pressure zero crossing of the signal sampling;
4) the CP signal that converter valve opertaing device produces according to it and receive return signal and send light trigger pulse to corresponding thyristor, judges whether conducting of respective thyristor, completes the test to change of current valve control system.
Under described low-voltage control model, each only one-level thyristor in single valve is added to alternating voltage, as long as just converter valve opertaing device receives that the return signal of a thyristor in single valve judges that this valve forward voltage sets up.
The phase place capable of regulating of described CP signal, the phase place that the starting point of CP signal high level is different from sampled signal zero crossing ratio deviation.
The sampling of AC signal described step 2) adopts the photoelectric conversion module of half-wave rectification to realize.
The light trigger pulse power that when the light trigger pulse power that in described step 5), converter valve opertaing device sends to converter valve thyristor is less than normal operation, converter valve opertaing device sends.
The invention has the beneficial effects as follows: the alternating voltage that the present invention is applied on thyristor by sampling makes converter valve opertaing device self produce CP signal, valve control equipment triggers thyristor according to the return signal of thyristor and its CP signal producing, triggering and guard condition have been realized simultaneously, make converter valve can low-voltage environment under, simulation normal operating condition, to meet the needs of test, debugging.Under this pattern, the light trigger pulse power that when the light trigger pulse power that in described step 5), converter valve opertaing device sends to converter valve thyristor is less than normal operation, converter valve opertaing device sends, can find the potential safety hazard existing in system components and parts ahead of time.
Accompanying drawing explanation
Fig. 1 is converter valve opertaing device test connection diagram under low-voltage control model;
Fig. 2 is control signal sequential chart under low-voltage control model in the present invention;
Fig. 3 is luminous power control principle drawing in the embodiment of the present invention;
Fig. 4 is AC sampling module schematic diagram in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
In normal mode when operation,, valve control system receives the unlocking signal of the utmost point control when effective, controls and enters released state.Under released state, valve control equipment sends trigger pulse need to meet two conditions to thyristor control plate.The one, receive the CP signal (triggering control wave) from utmost point control, the 2nd, receive from the thyristor forward voltage of thyristor control plate and set up signal.Different according to electric pressure, in single valve, thyristor quantity is different.Valve control system generally receives in single valve more than 70% (concrete engineering, parameter is different) thyristor return signal, judges to this valve forward voltage foundation.Now, converter valve control system is received the CP signal of utmost point control, can send immediately trigger pulse to thyristor to control the thyristor in the whole single valve of conducting.
Under low-voltage control model, converter valve opertaing device connects as shown in Figure 1, utmost point control control linkage converter valve opertaing device, in converter valve opertaing device, be provided with CPU module and AC power sampling module J1 and light transmitting-receiving interface, light transmitting-receiving interface connects the thyristor in converter valve by the corresponding optical fiber that triggers with time inspection optical fiber, is provided with in addition and makes equipment enter the button K1 of low-voltage control model and the knob S1 that adjusts the phase place of CP signal.AC power sampling module J1 is applied to the AC power at thyristor two ends for sampling, and the AC power sampling module J1 in the present embodiment as shown in Figure 4, is the photoelectric conversion module of a half-wave rectification, and sampled voltage is timing, and luminotron U1 sends light signal; When sampled voltage is negative, luminotron U1 is not luminous., CPU module is for receiving the light signal from sampling module, and according to light signal identification initial time, inner CP signal is set for high, after lasting 6.6ms, be set to low, until the next cycle, when light signal grows out of nothing, CPU module resets CP signal for high.Knob S1 is for adjusting the phase place that CPU module produces CP signal, and rotation S1 points to different positions, makes the starting point phase place different from zero crossing ratio deviation of CP signal high level.Converter valve opertaing device is because voltage is lower, can only be at every turn single thyristor in single valve be added to alternating voltage tests.This method of testing comprises the following steps.
1. by converter valve opertaing device button K1, make equipment enter low-voltage control model, or also can utilize utmost point control to issue control command and carry out long-range setting.
2. in pair converter valve, thyristor applies alternating voltage; thyristor sends it back to converter valve opertaing device the number of notifying; converter valve opertaing device is just judged this valve forward voltage foundation according to the return signal of receiving thyristor, and under this pattern, the system that arranges is exported trip protection signal to polar control system always.
3. valve control equipment gathers synchronizing signal by AC power sampling module J1, and will sample signal and be transferred to the CPU module of valve control equipment.
4. converter valve opertaing device produces CP signal according to the phase place of sampled signal, and the CP signal producing is effective when the alternating current positive pressure zero crossing of the signal sampling.Receive the light signal from sampling module, be identified as initial time, inner CP signal is set for high, continue to be set to after 6.6ms low, until the next cycle when this light signal grows out of nothing, need reset CP signal for high.The phase place of CP signal can be adjusted by knob S1 the phase place of CP signal, and rotation S1 points to different positions, makes the starting point phase place different from zero crossing ratio deviation of CP signal high level, as shown in Figure 2, at the positive zero crossing of alternating voltage, CP signal setting is high, and each cycle continues 6.6ms.
5. the CP signal that converter valve opertaing device produces according to it and receive return signal and send light trigger pulse to corresponding thyristor, judges whether conducting of respective thyristor, completes the test to change of current valve control system.The trigger pulse luminous power that wherein valve control equipment sends is less than the optical signal power in normal when operation, half of optical signal power during for normal operation.As shown in Figure 3, under normal mode, control TRIG1 effective, TRIG2 is invalid, makes not place in circuit of resistance R 169, only has R160 as the current-limiting resistance in luminous loop, under low-voltage control model, control TRIG1 invalid, TRIG2 is effective, make resistance R 160 and the resistance R 169 luminous loops of series connection access jointly as current-limiting resistance, thereby the luminous power of luminotron LE1 is weakened.
Current conversion station is greater than 35 years designed life, and after long-play, some equipment component likely can be slightly aging, such as triggering optical fiber, element interface etc.When doing regular maintenance, be difficult to find, once go wrong in normal operation, may bring serious harm.The present invention designs under low-voltage control model, the luminous power when luminous power of converter valve opertaing device is less than normal operation.Like this, can be easily existing the equipment component of potential safety hazard to come out when testing.Such as optical fiber attenuation is excessive, or optical fiber interface is loosening, under normal luminous power, still can trigger control thyristor.But while normally moving, these problems increase the weight of a little, just can cause loop fault, thyristor cannot be triggered.Under low-voltage control model, if there is above problem, by weakening luminous power, can pinpoint the problems easily and solve in time.
Claims (5)
1. a method of testing for converter valve opertaing device low-voltage control model, is characterized in that, this method of testing comprises the following steps:
1) under low voltage control pattern to converter valve in thyristor apply alternating voltage, make thyristor send it back to converter valve opertaing device the number of notifying;
2) according to receiving the AC power that applies of return signal, sample;
3) make converter valve opertaing device produce CP signal according to the phase place of sampled signal, the CP signal that it produces is effective when the alternating current positive pressure zero crossing of the signal sampling;
4) the CP signal that converter valve opertaing device produces according to it and receive return signal and send light trigger pulse to corresponding thyristor, judges whether conducting of respective thyristor, completes the test to change of current valve control system.
2. the method for testing of converter valve opertaing device low-voltage control model according to claim 1, it is characterized in that, under described low-voltage control model, each only one-level thyristor in single valve is added to alternating voltage, as long as just converter valve opertaing device receives that the return signal of a thyristor in single valve judges that this valve forward voltage sets up.
3. the method for testing of converter valve opertaing device low-voltage control model according to claim 1, is characterized in that, the phase place capable of regulating of described CP signal, the phase place that the starting point of CP signal high level is different from sampled signal zero crossing ratio deviation.
4. the method for testing of converter valve opertaing device low-voltage control model according to claim 1, is characterized in that described step 2) the sampling of AC signal adopt the photoelectric conversion module of half-wave rectification to realize.
5. the method for testing of converter valve opertaing device low-voltage control model according to claim 1, it is characterized in that the light trigger pulse power that when the light trigger pulse power that in described step 5), converter valve opertaing device sends to converter valve thyristor is less than normal operation, converter valve opertaing device sends.
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| CN201410159985.2A CN103926524B (en) | 2014-04-21 | 2014-04-21 | A kind of method of testing of change of current valve control system low-voltage control model |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132791A (en) * | 2017-04-24 | 2017-09-05 | 许继电气股份有限公司 | A kind of change of current control valve device |
| CN109239564A (en) * | 2017-07-10 | 2019-01-18 | 南京南瑞继保电气有限公司 | A kind of thyristor test macro based on the cooperation of software logic function |
| CN109613425A (en) * | 2019-01-02 | 2019-04-12 | 西安西电电力系统有限公司 | Converter valve test macro and test method |
| CN111308299A (en) * | 2019-11-05 | 2020-06-19 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Converter valve closed loop test system and method |
| CN112415354A (en) * | 2020-10-15 | 2021-02-26 | 许继集团有限公司 | Method for detecting thyristor-level unit of alternating-current energy-consumption converter valve |
| CN113176459A (en) * | 2021-04-01 | 2021-07-27 | 南方电网科学研究院有限责任公司 | Flexible direct current converter valve power module starting test method and circuit thereof |
| CN113791554A (en) * | 2021-08-25 | 2021-12-14 | 中国南方电网有限责任公司超高压输电公司昆明局 | Detection device and method for valve control system for converter valve |
| CN114069848A (en) * | 2021-10-29 | 2022-02-18 | 国网河南省电力公司直流运检分公司 | Thyristor-level state monitoring system of light-operated converter valve |
| CN114993464A (en) * | 2022-08-03 | 2022-09-02 | 中国南方电网有限责任公司超高压输电公司广州局 | Optical power detection system of thyristor control unit of converter valve |
| CN115219158A (en) * | 2022-07-18 | 2022-10-21 | 中国南方电网有限责任公司超高压输电公司广州局 | Thyristor converter valve detection circuit and method thereof |
| CN116381386A (en) * | 2023-04-04 | 2023-07-04 | 北京龙腾蓝天科技有限公司 | Comprehensive testing system and method for universal high-voltage direct-current transmission converter valve |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132791A (en) * | 2017-04-24 | 2017-09-05 | 许继电气股份有限公司 | A kind of change of current control valve device |
| CN109239564A (en) * | 2017-07-10 | 2019-01-18 | 南京南瑞继保电气有限公司 | A kind of thyristor test macro based on the cooperation of software logic function |
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| CN109613425A (en) * | 2019-01-02 | 2019-04-12 | 西安西电电力系统有限公司 | Converter valve test macro and test method |
| CN111308299B (en) * | 2019-11-05 | 2022-02-15 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Converter valve closed loop test system and method |
| CN111308299A (en) * | 2019-11-05 | 2020-06-19 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Converter valve closed loop test system and method |
| CN112415354A (en) * | 2020-10-15 | 2021-02-26 | 许继集团有限公司 | Method for detecting thyristor-level unit of alternating-current energy-consumption converter valve |
| CN112415354B (en) * | 2020-10-15 | 2023-08-15 | 许继集团有限公司 | Method for detecting thyristor level unit of alternating current energy consumption converter valve |
| CN113176459A (en) * | 2021-04-01 | 2021-07-27 | 南方电网科学研究院有限责任公司 | Flexible direct current converter valve power module starting test method and circuit thereof |
| CN113791554A (en) * | 2021-08-25 | 2021-12-14 | 中国南方电网有限责任公司超高压输电公司昆明局 | Detection device and method for valve control system for converter valve |
| CN114069848A (en) * | 2021-10-29 | 2022-02-18 | 国网河南省电力公司直流运检分公司 | Thyristor-level state monitoring system of light-operated converter valve |
| CN115219158A (en) * | 2022-07-18 | 2022-10-21 | 中国南方电网有限责任公司超高压输电公司广州局 | Thyristor converter valve detection circuit and method thereof |
| CN115219158B (en) * | 2022-07-18 | 2024-04-02 | 中国南方电网有限责任公司超高压输电公司广州局 | Thyristor converter valve detection circuit and method thereof |
| CN114993464A (en) * | 2022-08-03 | 2022-09-02 | 中国南方电网有限责任公司超高压输电公司广州局 | Optical power detection system of thyristor control unit of converter valve |
| CN114993464B (en) * | 2022-08-03 | 2023-09-15 | 中国南方电网有限责任公司超高压输电公司广州局 | Optical power detection system of thyristor control unit of converter valve |
| CN116381386A (en) * | 2023-04-04 | 2023-07-04 | 北京龙腾蓝天科技有限公司 | Comprehensive testing system and method for universal high-voltage direct-current transmission converter valve |
| CN116381386B (en) * | 2023-04-04 | 2024-04-02 | 北京龙腾蓝天科技有限公司 | Comprehensive testing system and method for universal high-voltage direct-current transmission converter valve |
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